تحقیق انگلیسی درباره دستمال کاغذی

تحقیق انگلیسی درباره دستمال کاغذی

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How is tissue paper made?

Soft tissue paper comes in varying thicknesses and textures but is primarily manufactured for facial tissue, toilet tissue, paper towels, serviettes and sometimes packing tissue.تحقیق انگلیسی درباره دستمال کاغذی

Pulping and Retting

The first step in the process of making soft tissue paper is creating paper pulp, which can be generated from wood fibre or recycled materials. Trees are logged and cut into chips which are then ground into fine flakes. Tissue paper manufacturers create their pulp by stirring together these retted (soaked and pulled apart) fine flakes in a mixing tank with a large quantity of water. The type of tree fibre and how much water is mixed in depends on the particular product being made.تحقیق انگلیسی درباره دستمال کاغذی

Wood Pulp

While the wood pulp is in the mixing tank, the manufacturer adds any components that may be needed to soften, strengthen or color the paper.

Pressing

Once the pulp is ready, it is poured over fast moving belts (these can be 2-6 metres wide) made from highly porous materials that are driven on huge drums heated by steam. The pouring of pulp has to be even and consistent across the width of the belt/drum. All the water escapes through the pores leaving just the fibres on the belt in the form of a delicate fabric. The tissue is transferred on to a massive heated roller called a Yankee. The Yankee roller is very hot and the fabric is dried almost instantly. The tissue paper is then transferred to a core to form a jumbo roll. You can adjust the draw speed of the jumbo roll to get a thicker or thinner tissue. The jumbo rolls are put onto the converting machine.

How are paper towels made?

The tissue paper for towel is made in a similar manner to the tissue paper produced for toilet tissue. The towel tissue is thicker and heavier with conditioners added to give strength when the paper is wet. Paper towels are available 2 ply, 3 ply and 4 ply varieties. The plies are embossed with a synchronised pattern and bonded together using lamination adhesive to add strength.تحقیق انگلیسی درباره دستمال کاغذی